Great Eastern class W
Great Britain 1862 31 produced
The first locomotives that the newly founded Great Eastern procured in 1862 were express locomotives with the 2-2-2 wheel arrangement. They had outside cylinders and double frames made of wood and iron. The 31 locomotives came from four different manufacturers, including Schneider et Cie from France.
From 1872 some were modernized and received a new boiler. Two of them were even rebuilt to a 4-2-2 wheel arrangement. Different designs of the cab were also used. The number 54 was scrapped in 1874 after an accident. The remainder remained in service on the main express trains for over 25 years and were retired between 1883 and 1894.
Technical data
General
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Built | 1862-1867 | 1872-1873 |
| Manufacturers | Fairbairn & Co., Slaughter & Gruening, Kitson & Co., Schneider | |
| Wheel arrangement | 2-2-2 (Jenny Lind) | 4-2-2 (Single) |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Wheelbase | 4.57 m | 6.33 m |
| Service mass | 29.7 t | 31.9 t |
| Adhesion mass | 11.5 t | 13.8 t |
| Total mass | 51.8 t | |
| Rigid wheelbase | 4.57 m | |
| Axle load | 11.5 t | 13.8 t |
Boiler
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Grate area | 1.459 m² | 1.542 m² |
| Firebox surface | 6.968 m² | 9.29 m² |
| Tube heating surface | 97.084 m² | 92.911 m² |
| Evaporative heating surface | 104.052 m² | 102.202 m² |
| Total heating surface | 104.1 m² | 102.2 m² |
Power plant
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Driver diameter | 2,159 mm | |
| Boiler pressure | 8.3 bar | 9.7 bar |
| Expansion type | simple expansion | |
| Cylinders | two, 406 x 610 mm | two, 432 x 610 mm |
Power
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Power source | steam | |
| Estimated power | 242 kW (329 PS) | 261 kW (355 PS) |
| Starting effort | 32.8 kN | |
Calculated values
| Property | as built | rebuilt 4-2-2 |
|---|---|---|
| Factor of adhesion | 1 : 3.45 | |
| Optimal speed | 45 km/h | |
| Power-to-weight ratio | 8.1 kW/t | 8.2 kW/t |
| Heating Surface Equivalent | 138.9 m² | 148.7 m² |
| Cylinder volume/HSE | 1 : 1,138.66 | 1 : 1,201.05 |
| Adhesive weight/Total | 1 : 2.58 | 1 : 2.32 |
| Tractive force/Heating surface | 1 : 6.58 | |
| Grate area/Heating surface | 1 : 71.32 | 1 : 66.28 |
| Firebox/Tube surface | 1 : 13.93 | 1 : 10.00 |
